Ramón Portillo

9.7k total citations · 3 hit papers
62 papers, 7.6k citations indexed

About

Ramón Portillo is a scholar working on Electrical and Electronic Engineering, Control and Systems Engineering and Public Health, Environmental and Occupational Health. According to data from OpenAlex, Ramón Portillo has authored 62 papers receiving a total of 7.6k indexed citations (citations by other indexed papers that have themselves been cited), including 46 papers in Electrical and Electronic Engineering, 21 papers in Control and Systems Engineering and 6 papers in Public Health, Environmental and Occupational Health. Recurrent topics in Ramón Portillo's work include Multilevel Inverters and Converters (44 papers), Advanced DC-DC Converters (32 papers) and HVDC Systems and Fault Protection (21 papers). Ramón Portillo is often cited by papers focused on Multilevel Inverters and Converters (44 papers), Advanced DC-DC Converters (32 papers) and HVDC Systems and Fault Protection (21 papers). Ramón Portillo collaborates with scholars based in Spain, Czechia and Chile. Ramón Portillo's co-authors include Leopoldo G. Franquelo, José I. Leon, María A. Martín-Prats, J.M. Carrasco, E. Galván, Samir Kouro, José Rodríguez, Jan T. Białasiewicz, Narciso Moreno-Alfonso and Marcelo A. Pérez and has published in prestigious journals such as Cancer Research, Proceedings of the IEEE and Scientific Reports.

In The Last Decade

Ramón Portillo

60 papers receiving 7.2k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Power-Electronic Systems for the Grid Integration of Renewable Energy Sources: A Survey

2006 3.1k citations J.M. Carrasco, Leopoldo G. Franquelo et al. IEEE Transactions on Industrial Electronics profile →
The age of multilevel converters arrives

2008 1.6k citations Leopoldo G. Franquelo, José I. Leon et al. profile →
Multilevel Converters: An Enabling Technology for High-Power Applications

2009 958 citations Leopoldo G. Franquelo, Samir Kouro et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Ramón Portillo Spain	24	7.1k	3.8k	850	415	397	62	7.6k
Yaow-Ming Chen Taiwan	34	3.9k 0.6×	1.6k 0.4×	1.2k 1.4×	300 0.7×	1.4k 3.5×	165	4.5k
Yong Kang China	43	7.3k 1.0×	3.6k 0.9×	1.5k 1.7×	731 1.8×	719 1.8×	366	8.1k
Iftikhar Ahmad Pakistan	28	1.5k 0.2×	961 0.3×	412 0.5×	166 0.4×	720 1.8×	115	2.2k
Hongchang Li China	28	3.1k 0.4×	1.5k 0.4×	84 0.1×	452 1.1×	718 1.8×	106	4.0k
Cao Guang-yi China	28	1.8k 0.3×	646 0.2×	957 1.1×	379 0.9×	676 1.7×	135	2.8k
Lei Wang China	32	3.3k 0.5×	1.8k 0.5×	316 0.4×	270 0.7×	773 1.9×	311	4.1k
Dongsheng Yang China	28	3.5k 0.5×	2.7k 0.7×	229 0.3×	771 1.9×	356 0.9×	133	3.9k
Zhen Wang China	30	2.5k 0.4×	2.1k 0.6×	191 0.2×	648 1.6×	61 0.2×	130	3.6k
Marcelo A. Pérez Chile	35	12.0k 1.7×	4.6k 1.2×	460 0.5×	222 0.5×	474 1.2×	206	12.5k

Countries citing papers authored by Ramón Portillo

Since Specialization

Citations

This map shows the geographic impact of Ramón Portillo's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ramón Portillo with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ramón Portillo more than expected).

Fields of papers citing papers by Ramón Portillo

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ramón Portillo. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ramón Portillo. The network helps show where Ramón Portillo may publish in the future.

Co-authorship network of co-authors of Ramón Portillo

This figure shows the co-authorship network connecting the top 25 collaborators of Ramón Portillo. A scholar is included among the top collaborators of Ramón Portillo based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ramón Portillo. Ramón Portillo is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Abad, Cilia, Ivana Musilová, Ramón Portillo, et al.. (2025). Impact of intraamniotic inflammation on tryptophan metabolism in the placenta-fetal brain axis in rats. Reproduction. 169(5).

Portillo, Ramón, et al.. (2025). Effects of prenatal cannabinoid use on the monoamine system in the fetoplacental unit: A systematic review of animal and human studies. Drug and Alcohol Dependence. 268. 112579–112579.

Karahoda, Rona, et al.. (2024). Developmental expression of catecholamine system in the human placenta and rat fetoplacental unit. Scientific Reports. 14(1). 6948–6948. 2 indexed citations

Portillo, Ramón, et al.. (2024). Cannabidiol disrupts tryptophan metabolism in the human term placenta. Toxicology. 505. 153813–153813. 4 indexed citations

Abad, Cilia, et al.. (2023). Pathological shifts in tryptophan metabolism in human term placenta exposed to LPS or poly I:C. Biology of Reproduction. 110(4). 722–738. 4 indexed citations

Morell, A, Yu Zhang, Eva Novotná, et al.. (2022). Isocitrate dehydrogenase 2 inhibitor enasidenib synergizes daunorubicin cytotoxicity by targeting aldo-keto reductase 1C3 and ATP-binding cassette transporters. Archives of Toxicology. 96(12). 3265–3277. 7 indexed citations

Abad, Cilia, Rona Karahoda, Ramón Portillo, et al.. (2020). Profiling of Tryptophan Metabolic Pathways in the Rat Fetoplacental Unit during Gestation. International Journal of Molecular Sciences. 21(20). 7578–7578. 20 indexed citations

Marquez, Abraham, José I. Leon, Ramón Portillo, et al.. (2020). Real-Time Selective Harmonic Mitigation Technique for Power Converters Based on the Exchange Market Algorithm. Energies. 13(7). 1659–1659. 13 indexed citations

Marquez, Abraham, José I. Leon, Ramón Portillo, et al.. (2020). Variable-Angle PS-PWM Technique for Multilevel Cascaded H-Bridge Converters With Large Number of Power Cells. IEEE Transactions on Industrial Electronics. 68(8). 6773–6783. 31 indexed citations

10.

Marquez, Abraham, José I. Leon, Ramón Portillo, et al.. (2015). Adaptive phase-shifted PWM for multilevel cascaded H-bridge converters for balanced or unbalanced operation. 5124–5129. 5 indexed citations

11.

Portillo, Ramón, et al.. (2010). Trypanosoma evansi: Pharmacological evidence of a nicotinic acetylcholine receptor. Experimental Parasitology. 125(2). 100–105. 7 indexed citations

12.

Mijares, Alfredo, et al.. (2010). Immune detection of acetylcholinesterase in subcellular compartments of Trypanosoma evansi. Parasitology Research. 108(1). 1–5. 5 indexed citations

13.

Leon, José I., Sergio Vázquez, Ramón Portillo, Leopoldo G. Franquelo, & Eugenio Domínguez. (2010). Two-dimensional modulation technique with dc voltage control for single-phase two-cell cascaded converters. idUS (Universidad de Sevilla). 1365–1370. 14 indexed citations

14.

Mijares, Alfredo, et al.. (2009). Trypanosoma evansi: Effect of experimental infection on the osmotic fragility, lipid peroxidation and calcium-ATPase activity of rat red blood cells. Experimental Parasitology. 124(3). 301–305. 21 indexed citations

15.

Portillo, Ramón, et al.. (2009). Immunoglobulin A with protease activity secreted in human milk activates PAR-2 receptors, of intestinal epithelial cells HT-29, and promotes beta-defensin-2 expression. Immunology Letters. 123(1). 52–59. 17 indexed citations

16.

Jones, Stephen E., Ruth Oratz, Devchand Paul, et al.. (2009). Cardiac Safety Results of a Phase II Trial of Adjuvant Docetaxel/Cyclophosphamide Plus Trastuzumab (Her TC) in HER2+ Early Stage Breast Cancer Patients.. Cancer Research. 69(24_Supplement). 5082–5082. 2 indexed citations

17.

Franquelo, Leopoldo G., José I. Leon, M.M. Prats, & Ramón Portillo. (2006). Space vector modulation techniques for multilevel converters - a survey. PRZEGLĄD ELEKTROTECHNICZNY. 56–61. 3 indexed citations

18.

Portillo, Ramón, M.M. Prats, José I. Leon, et al.. (2006). Modeling Strategy for Back-to-Back Three-Level Converters Applied to High-Power Wind Turbines. IEEE Transactions on Industrial Electronics. 53(5). 1483–1491. 174 indexed citations

19.

Franquelo, Leopoldo G., et al.. (2006). Three-dimensional space-vector modulation algorithm for four-leg multilevel converters using abc coordinates. IEEE Transactions on Industrial Electronics. 53(2). 458–466. 112 indexed citations

20.

Cáceres, Ana J., Ramón Portillo, Héctor Acosta, et al.. (2003). Molecular and biochemical characterization of hexokinase from Trypanosoma cruzi. Molecular and Biochemical Parasitology. 126(2). 251–262. 71 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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